abdomen Wrote: > Sean Adams has done some lab work. > http://www.seanadams.com/smps_vs_linear/
Actually those numbers were looking strictly at DAC performance WRT to the noise floor and THD+N measurements. The conclusion being that you CAN improve performance at the DAC with better _local_ regulation (Walt-Jung / ALWSR mods) but swapping the external power supply (which goes though a few stages of internal step-up, filtering, and then linear regulation before reaching the DAC) is pointless IMHO. Jitter is a different story (as it does not involve the isolating multiplier/linear-reg stages that the DAC uses) and I shared some measurements on this a while back: http://tinyurl.com/etl3t Unforunately my equipment at the time couldn't say much beyond "yes there's a difference" - a slight change in the shape of the histogram. I have a new high-end LeCroy scope on order, and am hoping to make some more accurate and detailed measurements soon. On a slight tangent if you happen to be poking around my seldom-updated web site you may notice that every once in a while I update the quote at the top of the page depending on whatever I happen to be thinking about at that moment. The most recent is from Freud, who lambasted his peers as being "a shining example of the repugnance to learning anything new, which is characteristic of men of science". It has certainly been an "ear-opener" for me to discover what some trained listeners can detect... If better sound is your goal, keep an open mind, and by no means take any suggestion at face value! -- seanadams ------------------------------------------------------------------------ seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=21556 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
